Ruby2.0.0 + Rails3.2.12 + Puma + Heroku

• A Modern, Concurrent Web Server for Ruby - Puma
• puma/puma · GitHub
• @ctshryock | Running Rails with Puma on Heroku
• Better Performance On Heroku: Thin vs. Unicorn vs. Puma - Ylan Segal - on.code && such

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• Mike Subelsky: Setting up Puma & Rails on Heroku

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• vi Gemfile

gem 'puma'

bundle install

rails s puma

• vi Procfile

web: bundle exec puma -p $PORT -e $RACK_ENV -C config/puma.rb

• vi config/environments/production.rb

  # For Puma
  config.threadsafe!

• vi config/puma.rb

require "active_record"
cwd = File.dirname(__FILE__)+"/.."
ActiveRecord::Base.connection.disconnect! rescue ActiveRecord::ConnectionNotEstablished
ActiveRecord::Base.establish_connection(ENV["DATABASE_URL"] || YAML.load_file("#{cwd}/config/database.yml")[ENV["RACK_ENV"]])
ActiveRecord::Base.verify_active_connections!

• NewRelic

heroku config:add NEWRELIC_DISPATCHER=Puma